CVE-2017-11456 in GWR
Summary
by MITRE
Geneko GWR routers allow directory traversal sequences starting with a /../ substring, as demonstrated by unauthenticated read access to the configuration file.
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Analysis
by VulDB Data Team • 09/08/2024
The vulnerability identified as CVE-2017-11456 affects Geneko GWR routers and represents a critical directory traversal flaw that enables unauthenticated attackers to access sensitive system files. This vulnerability stems from improper input validation within the router's web interface, specifically in how it processes file path requests that contain directory traversal sequences. The flaw manifests when the application fails to adequately sanitize user-supplied input that includes the /../ substring pattern, allowing malicious actors to navigate through the file system hierarchy and retrieve files that should remain protected.
The technical implementation of this vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. This weakness occurs when applications fail to properly validate or sanitize file path inputs, enabling attackers to access files outside of the intended directory structure. In the context of network routers, this vulnerability is particularly dangerous because it can expose critical system configuration files, authentication credentials, and other sensitive data that could be used for further exploitation or lateral movement within a network infrastructure.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with unauthorized access to router configuration files that typically contain administrative credentials, network settings, and other sensitive operational data. This unauthenticated access means that any remote attacker can exploit the vulnerability without requiring valid login credentials, making it especially dangerous for devices deployed in untrusted network environments. The exposure of configuration files can lead to complete compromise of the affected router, enabling attackers to modify network settings, redirect traffic, or establish persistent access points within the network.
Security professionals should consider this vulnerability in relation to ATT&CK technique T1213, which covers data from information repositories, as it allows attackers to extract sensitive data from network infrastructure devices. Mitigation strategies should include implementing proper input validation and sanitization mechanisms, restricting web interface access to authorized personnel only, and ensuring that all affected devices receive firmware updates from the manufacturer. Network segmentation and monitoring of unusual file access patterns can also help detect exploitation attempts, while regular security assessments should verify that directory traversal vulnerabilities have been properly addressed in all network infrastructure components. Organizations should prioritize patch management for affected Geneko GWR router models and consider implementing network access controls to limit exposure of such devices to untrusted networks.